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Climate change: Ten ways to save the world

Not revolutionary, but by using energy more efficiently in our homes and offices, and switching to renewable power sources, the biggest climate-savers are likely to be ourselves

2 Solar surplus

Sunlight energy - the most abundant source of free energy on the planet - is high on the list. With the right technology, there is an endless amount to intercept

3 Carbon capture

When we find the best way to do it, sucking up and storing CO2 from the atmosphere will be key to combating global warming. At present, however, these technologies are hugely energy-intensive

4 Plant power

Growing plants, such as oil palms, for fuel is dogged by ecological and food-conservation issues. However, second-generation biofuels use agricultural waste to generate energy. Most promising are third-generation biofuels, using algae. Algae farms could convert sunlight into oil